
companyList = ["google", "apple", "ali", "tencent"]
mixList = ["string", 1, 3.1415926, 1+2J, companyList]


for mix in mixList[0:5]:
    print(mix)

print("-------------------------------")
mixList[0] = "this is a string"
for mix1 in mixList:
    print(mix1)


print("-------------------------------")
del mixList[0]
for mix1 in mixList:
    print(mix1)

